INTERNATIONAL STANDARD

Transcription

1 INTERNATIONAL STANDARD IEC Edition Residual current operated circuit-breakers for household and similar use Part 3-3: Specific requirements for RCDs with screw-type terminals for external untreated aluminium conductors and with aluminium screw-type terminals for use with copper or with aluminium conductors INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS ISBN Warning! Make sure that you obtained this publication from an authorized distributor. Registered trademark of the International Electrotechnical Commission

2 2 IEC :2016 IEC 2016 CONTENTS FOREWORD... 3 INTRODUCTION Scope Normative references Terms and definitions Classification Characteristics of RCDs Marking and other product information Standard conditions for operation in service and for installation Requirements for construction and operation Tests General Test conditions Current cycling test General Preparation Test arrangement Temperature measurement Test method and acceptance criteria Bibliography Figure 1 General arrangement for the test Figure 2 Test specimen example Figure 3 Test specimen example Figure 4 Test specimen example Figure 5 Test specimen example Figure 6 Test specimen example Table 1 Marking for terminals... 8 Table 2 Connectable cross-sections of aluminium conductors for screw-type terminals... 8 Table 3 List of tests according to the material of conductors and terminals... 9 Table 4 Connectable conductors and their theoretical diameters Table 5 Cross-sections (S) of aluminium test conductors corresponding to the rated currents Table 6 Test conductor length Table 7 Equalizer and busbar dimensions Table 8 Test current as a function of rated current Table 9 Example of calculation for determining the average temperature deviation D... 14

3 IEC :2016 IEC INTERNATIONAL ELECTROTECHNICAL COMMISSION RESIDUAL CURRENT OPERATED CIRCUIT-BREAKERS FOR HOUSEHOLD AND SIMILAR USE Part 3-3: Specific requirements for RCDs with screw-type terminals for external untreated aluminium conductors and with aluminium screw-type terminals for use with copper or with aluminium conductors FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as IEC Publication(s) ). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and nongovernmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC has been prepared by subcommittee 23E: Circuit breakers and similar equipment for household use, of IEC technical committee 23: Electrical accessories. The text of this standard is based on the following documents: FDIS 23E/966/FDIS Report on voting 23E/984/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

4 4 IEC :2016 IEC 2016 A list of all parts of the IEC series published under the general title Residual current operated circuit-breakers for household and similar use can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under " in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date.

5 IEC :2016 IEC INTRODUCTION This document is part of the series described in the outline document IEC

6 6 IEC :2016 IEC 2016 RESIDUAL CURRENT OPERATED CIRCUIT-BREAKERS FOR HOUSEHOLD AND SIMILAR USE Part 3-3: Specific requirements for RCDs with screw-type terminals for external untreated aluminium conductors and with aluminium screw-type terminals for use with copper or with aluminium conductors 1 Scope This part of IEC applies to RCDs equipped with screw-type terminals of copper or of alloys containing at least 58 % of copper (if worked cold) or at least 50 % of copper (if worked otherwise), or of other metal or suitably coated metal, no less resistant to corrosion than copper and having mechanical properties no less suitable for use with untreated aluminium conductors, or with screw-type terminals of aluminium material for use with copper or aluminium conductors. This part of IEC cannot be used alone but it is intended to be applied together with an RCD product standard (IEC or IEC ) if an RCD is equipped with screw-type terminals for external untreated aluminium conductors and with aluminium screw-type terminals for use with copper or with aluminium conductors. In this part of IEC 62873, copper-clad and nickel-clad aluminium conductors are considered as aluminium conductors. NOTE In AT, AU and DE, the use of aluminium screw-type terminals for use with copper conductors is not allowed. In AT and DE, terminals for aluminium conductors only are not allowed; In ES, the use of aluminium conductors is not allowed for final circuits in household and similar installations e.g. offices, shops; In DK, the minimum cross-sectional area for aluminium conductors is 16 mm 2. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC , Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs) Part 1: General rules IEC , Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) Part 1: General rules IEC , Residual current operated circuit-breakers for household and similar use Part 2: Residual current devices (RCDs) Vocabulary